998 na 1275 head rebuild but still issues
Turbo Mini Forums

So the 998 got a rebuild. Its reving well but it used to rev to 7 k easy with this set up. Now its starts to spit and puf on 5 k rpm top. In 1st it easily gos up the revs but all the rest stops at aprox 5 k rpm. I set the ignition with strobo to 8 degree ( otherwise ibset it by ear till it tuns smooth and that meant 14 degree! ) fueling seems fine though ( nice brown plugs)

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018

blocked fuel filter?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

No fuel filter in there. Now. Did some more testing. And noticed it does have to be fueling. When i drive at 3/4 trotle it dos pul straight to 6 k rpm. And should be put a bit richer. ( fresh fuel in now... hiw fast can fuel detiriate)

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018

is there a little woven filter in the carb ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

no. and carbs been rebuild. start to suspect the fuel pump not being strong enough to fill both carbs fast enough.

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018

set the mixture on the edge of to rich but still ... if i give it like 3 mm less then full throttle it go's really good to 5500 a 6000 rpm and easily does 150 kmh on the trip master. but floor it and it starts to ratle again ignition on 8 degrees or even up to 16 makes no difference. suspecting the electronic dizzy.

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018